/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlineSessionInterface.h
Returns the name for the Voice Chat room, if any were created by setting bUseLobbiesVoiceChatIfAvailable to true during session creation
the name for the corresponding Voice Chat room, or an emptyFStringif there is none
virtual [FString](API\Runtime\Core\Containers\FString) GetVoiceChatRoomName ( int32 LocalUserNum, const [FName](API\Runtime\Core\UObject\FName) & SessionName )